{"cve":"CVE-2026-61634","nvd":{"published":"2026-08-18T17:16:59.960","modified":"2026-10-22T22:10:00.250","status":"Awaiting Analysis","description":"The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.0, the AMQP connection tuning path records the negotiated AMQP frame_max value, but src/main/java/com/rabbitmq/client/impl/SocketFrameHandler.java and NettyFrameHandlerFactory continue to validate broker-controlled frame payload lengths against maxInboundMessageBodySize because the negotiated limit is not applied consistently through setMaxInboundFramePayloadSize. A malicious or compromised broker can send a method frame larger than the negotiated frame_max during or after connection establishment, causing the client to allocate and decode a protocol-invalid frame instead of rejecting it with MalformedFrameException. The protocol violation can disrupt the affected connection and cause client-side denial of service. This issue is fixed in version 5.33.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N","score":0.0},"cvss_v3":null,"cwes":["CWE-20"],"references":["https://github.com/rabbitmq/rabbitmq-java-client/commit/08790f09686173eb17b48d08a25edcb32e71a591","https://github.com/rabbitmq/rabbitmq-java-client/commit/b491075f42e89967610c40beded68d3680cfd472","https://github.com/rabbitmq/rabbitmq-java-client/pull/1994","https://github.com/rabbitmq/rabbitmq-java-client/pull/1995","https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.0"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-61634","score":0.00488,"percentile":0.41727,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-5xwg-cfvj-gff5","url":"https://osv.dev/vulnerability/GHSA-5xwg-cfvj-gff5","summary":"RabbitMQ Java client accepts broker frames larger than the negotiated AMQP frame_max","modified":"2026-09-10T03:51:13.134044568Z","packages":[{"ecosystem":"Maven","name":"com.rabbitmq:amqp-client","purl":"pkg:maven/com.rabbitmq/amqp-client","ranges":["<5.33.0"],"fixed":["5.33.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}